Antarctica is warming roughly twice as fast as the rest of the planet, putting its vast ice sheets, surrounding oceans, and unique ecosystems at growing risk. A new study led by researchers from the Australian National University and the University of New South Wales warns that the continent may face sudden and potentially irreversible changes. Without sharp global reductions in carbon emissions, these shifts could reverberate far beyond Antarctica, affecting ocean currents, weather patterns, and coastal communities across Australia and around the world.